Means for attaching rock-drilling machines to their feeding devices.



I. F. VAN DER VELDE. MEANS FOR ATTACHING ROCK DRILLING MACHINES TO THEIRFEEDING DEVICES.

APPLICATION FILED MAR- 5.1913.

Patented May 2, 1916.

E] vwa Wcoz JOHN EVAN DER VELDE T @FFIQ.

JOHN FREDERICK VAN DER VELDE, OF JEPIESTOWN, JOI-IANNESBURG, TRANSVAAL,

SOUTH AFRICA.

MEANS FOR ATTACHING ROCK-DRILLING MACHINES TO THEIR FEEDING DEVICES.

Application filed March 5, 1913.

To all whom it may concern:

Be it known that I, JOHN FREDERICK VAN one VELDE, a citizen of theUnited States of America, residing at corner of Main and Browningstreets, J eppestown, Johannesburg, in the Province of the Transvaal,Union of South Africa, have invented new and useful Improvements inMeans for At taching Rock-Drilling Machines to Their Feeding Devices, ofwhich the following is' a specification.

The present invention relates to improvements in rock drilling machinecradles and in the means for attaching the machine to the same.

A particular object of the invention is to provide a renewable part,between the cylinder of the machine, and the cradle and feeding means,which part may be replaced when worn without necessitating replacementof the machine cylinder.

I11 the accompanying drawings: Figure l is a side elevation of themachine and cradle partly in section. Fig. 2 is a section on the lineA-A, Fig. 1. Fig. 3 is a side elevation of a part of a modified form ofcradle. Figs. at and 5 are, respectively, side and end views of theslipper with renewable nut therein.

According to this invention, the cylinder 1 of the rock drilling machinehas a bracket 2 fastened to it (see Fig. 1), or formed on it (see Fig.5). The cradle of the machine comprises a frame 3 provided withguideways 4: parallel and opposite to one another and a channel 5between them for affording a passage-way for the feed screw 6 and nut 7.In guide-ways 4: is placed a slipper 8 provided with a projection 9which may be threaded to form the nut 7 or bored out to carry adetachable nut 10. Slipper 8 is secured to the bracket 2 by such meansas bolts 22. i

The feed screw 6 is supported in bearings 11, 12 placed one at each endof frame 3. At the rear end it is provided with the usual crank handle13. At the front end of the frame 3 a bracket 14: is attached to providebearing 12. Bracket 14 is made detachable from frame 3 to allow nut 7 tobe passed onto screw 6.

Specification of Letters Patent.

Patented May 2, 1916.

Serial No. 752,244.

For keeping the drilling machine in line with the cradle there may beprovided be tween bracket 2 and slipper 8 a projection 15 'on the onefitting into a recess 16 in the other and to assist in maintaining suchalinement and in order to lessen the wear on slipper 8 in the guides 4,there may be provided a support 17 for the drilling tool 18.

By the use of this invention a drill cylinder unprovided with means forattaching it to a cradle, c. g. the cylinder of some forms of hammerdrills, may be attached to the cradle by roviding a clamp 19 carryingthe bracket 2 and taking onto the outside of the rock drill cylinder.

The cradle frame 3 may be provided with means such as the pin 20 ormushroom 21 (Fig. 3) for attaching it to a stopping bar or othersupport.

It will be understood that this invention provides a ready means ofremedying a defeet in a machine due to wear or breakage of anyparticular part, by the simple replacement of the part required, thusallowing all parts to be kept in use until broken or worn out.

WVhat I claim, and desire to secure by Letters Patent is 1. Incombination with a rock drilling machine and a cradle therefor, abracketon the machine, a slipper'renewably attached to said bracket,guide-ways in the cradle in which said slipper works, a feed screw onsaid cradle and a nut associated with said slipper and working on saidfeed screw.

2. In combination with a rock drilling machine and a cradle therefor, abracket detachably secured to said machine, a slipper renewably attachedto said bracket, guide-ways in the cradle in which said slipper works, afeed screw associated with said cradle, and a nut detachably secured tosaid slipper and working on said feed screw.

In testimony whereof, I have signed my name to this specification in thepresence of two subscribing witnesses.

JOHN FREDERICK VAN DER VELDE.

IVitnesses WESLEY E. JOHN, JOHN ERNEST HYsLor.

Copies of this patent may he obtained for five cents each, by addressingthe "Commissioner of Iatents, Washington, D. Q.

